An unprivileged write to the file handler flaw in the Linux kernel's control groups and namespaces subsystem was found in the way users have access to some less privileged process that are controlled by cgroups and have higher privileged parent process. It is actually both for cgroup2 and cgroup1 versions of control groups. A local user could use this flaw to crash the system or escalate their privileges on the system.
Advisories
Source ID Title
Debian DSA Debian DSA DSA-5127-1 linux security update
Debian DSA Debian DSA DSA-5173-1 linux security update
EUVD EUVD EUVD-2021-34056 An unprivileged write to the file handler flaw in the Linux kernel's control groups and namespaces subsystem was found in the way users have access to some less privileged process that are controlled by cgroups and have higher privileged parent process. It is actually both for cgroup2 and cgroup1 versions of control groups. A local user could use this flaw to crash the system or escalate their privileges on the system.
Ubuntu USN Ubuntu USN USN-5278-1 Linux kernel (OEM) vulnerabilities
Ubuntu USN Ubuntu USN USN-5337-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-5368-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-5467-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-5500-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-5505-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-5513-1 Linux kernel (AWS) vulnerabilities
Ubuntu USN Ubuntu USN USN-5515-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-5541-1 Linux kernel (Azure) vulnerabilities
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2024-08-03T17:16:04.250Z

Reserved: 2022-01-03T00:00:00

Link: CVE-2021-4197

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2022-03-23T20:15:10.200

Modified: 2024-11-21T06:37:07.517

Link: CVE-2021-4197

cve-icon Redhat

Severity : Moderate

Publid Date: 2021-09-12T09:00:00Z

Links: CVE-2021-4197 - Bugzilla

cve-icon OpenCVE Enrichment

No data.